capacitor

You can probably order them through: HARMAN - Premium audio and entertainment for automotive, home, and professional. Speakers, amplifiers, headphones, microphones, home theater and personal audio.
They own Levinson now. Or, you can replace it with a much smaller capacitor, without any degradation in sound. I narrowed it down on Newark, any one of them should work, there's 35 matches, just scroll down to view them all:
Your Search Results | Newark.com
is ok put 200vdc 51000uf
 
Your Levinson 332 uses Four 50000uf/100V with 125V surge for filter supply and four 1900uf/150V for regulator supply. The 51000uf/200V cornell dubilier cap will not fit in Levinson they are 8.5 inches long. The Cornell dubilier DCMC513T160FE2D Capacitor 51000uf/160V cap is 5.2 inches long. Capacitor must be less than 6 inches long to fit in Levinson. Also there is a capacitor made by Tech Cap 50000uf/125V cap will work for your Levinson. I have these caps for sale.